Durable and Strong Suction Cup: The thickened large suction cup with a diameter of 6.5cm increases the suction area and increases the adsorption force. After pressing out the air, the powerful suction is stronger than ordinary suction cups. Detachable: The detachable food trough allows you to easily and conveniently replenish fresh bird seeds without moving the whole bird feeder. Porous Drainage System: With 32 integrally formed holes, it can effectively and quickly drain the moisture accumulated on the tray due to rain and snow, so that the food in the tray can be kept dry and prevent mold; 2mm holes are enough to drain accumulated water and prevent seeds from passing through Easy to install, just two steps: 1. Attach the suction cup to the bird feeder 2. Press Clean Window. Notice: 1. Be sure to wipe the window clean, otherwise the suction cup may be unstable. 2. Soak the suction cup in water, it may be stronger.